NDLI: Micro-Range Actuation by Pressure-Induced Elastic Deformation of 316L Steel Membranes Produced by Laser Powder Bed Fusion

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Micro-Range Actuation by Pressure-Induced Elastic Deformation of 316L Steel Membranes Produced by Laser Powder Bed Fusion

Content Provider	MDPI
Author	Fettweis, Florian Verrelst, Bjorn Bram, Svend
Copyright Year	2021
Description	In this paper, fundamental research is performed on membrane type actuators made out of 316L stainless steel, manufactured with Laser powder bed fusion (LPBF). A total of six membranes with membrane thicknesses ranging from 0.6 mm up to 1.2 mm were scanned using a high precision metrology system to measure the membrane for displacement at different actuating pressures. The membranes were furthermore investigated for roughness, porosity and thickness. This showed that the thinnest membranes skewed in the print direction when actuated. The remaining membranes achieved higher specific displacements than finite element simulations (FES) predicted, due to surface roughness and porosity. Membrane type actuators can be used for precise actuation within the micrometre range. LPBF allows the creation of internal pockets and membranes in a single metal piece. In opposition to the more commonly used polymers for membrane-type actuators, LPBF steel printed parts offer high stiffness and actuation force. However, due to limitations of the LPBF process on thin walls, large deviations from FES occur. In this paper, a CAD and FES compensation strategy is suggested, which makes future, more complex and effective, designs possible.
Starting Page	296
e-ISSN	20760825
DOI	10.3390/act10110296
Journal	Actuators
Issue Number	11
Volume Number	10
Language	English
Publisher	MDPI
Publisher Date	2021-11-06
Access Restriction	Open
Subject Keyword	Actuators Manufacturing Engineering Additive Manufacturing Application Laser Powder Bed Fusion Micro-range Actuation Membrane Actuator 316l Stainless Steel
Content Type	Text
Resource Type	Article

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